Delta OHM HD21ABE, Руководство пользователя

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PROBE CALIBRATION
CALIBRATION CO
2
1) Offset only calib
2) 2 Pts Calibration
3) Restore Fact cal
▼▲
select
<ESC> exit/cancel
<ENTER> confirm
The CO
2
sensor can be calibrated:
•
In 1 point: only the sensor offset is corrected, the point can be any value between 0 and
950 ppm.
•
In 2 points: the sensor offset and slope are corrected, the lower point can be any value
between 0 and 950 ppm, the upper point can be any value between 1000 ppm and the full
scale of the instrument.
1 point calibration:
1. Place the instrument in an environment with known CO
2
concentration between 0 and 950 ppm (for ex. in clean air). For
0 ppm calibration with nitrogen bottle (code MINICAN.12A),
slide the HD21AB17.9 accessory on the top of the instrument
and connect the tube from the nitrogen bottle to the CO
2
input of
the accessory; adjust the bottle flow meter to get a constant
flow from 0.3 to 0.5 l/min.
2. Wait about 15 minutes before continuing.
3. When the measurement is stable, select the 1) Offset only calib
calibration option.
4. The instrument display shows the measured CO
2
.
CALIBRATION CO
2
OFFSET CALIBRATION
START CALIBRATION
CO
2
450 ppm
<ESC> exit/cancel
<ENTER> confirm
5. Adjust the value by using the arrows ▼▲ .
6. Press ENTER on the instrument and wait the time necessary
for calibration without changing the working conditions.
7. When the “CALIBRATION GOOD” indication appears, press
ESC to return to the calibration menu.